Otto vogelsang



(No Model.)

O. VOGELSANG. v VALVE GEAR FOR GAS ENGINES 0R PETROLEUM ENGINESV No. 438,785.

Patented Oct. 21., 1890.

UNITED STATES PATENT OFFICELf orro VOGELSANG, or PLANEN, NEAR DRESDEN, SAXONY, Assienoa rd MORITZ HILLE, OF DRESDEN, GERMANY.

VALVE-GEAR FOR GAS-ENGINES OR PETROLEUM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 438,785, dated October 21, 1 890.

Application filed July 30, 1890- .sists in the combination, with the admissionvalve for gas or vapor, of a suitably-balanced lever oscillated in one direction by the engine and in the other by gravity, and through the medium whereof the operation of the admission-valve is so controlled that the latter will be opened at every stroke of the slidevaly e or not, according as the engine runs at the ordinarypr at an excessive speed.

The mechanism is constructed as follows: Opposite to the stem of the admission-valve and at some distance therefrom is arranged a reciprocating finger, moving in a line with the said stem and synchronously with the slide-valve. By the side of these parts is placed a lever capable of oscillating by gravity and carrying a movable pin controlled by a spring, the lever and the pin being so disposed that when the lever is in a certain position,which I shall call its operative position, the pin will be lengthwise between the stem of the admission-valve and the reciprocating finger. The pin has such length that under the said conditions the finger on advancing will press the pin against the valve-stem, and thus open the valve, the pin being pushed backward again by its spring when the finger recedes. At one side of the said lever there is an oscillating or reciprocating tappet, which at every stroke of the slide-valve acts on the lever to oscillate the same, so as to throw the pin out of line with the admission-valve stem and the reciprocating finger. The lever is, however, balanced in such man ner that when the engine runs at the proper speed the lever, after having been swung out of its operative position, will return thereto just in time to be again acted upon by the recip- Serial No. 360,395. (No model.)

rocating finger at its next forward stroke. The admission-valve is in this case opened at every stroke of the slide-valve; but if the speed of the engine is too great the lever on: oscillating backward will be too late for the pin to be engaged by the reciprocating finger. The admission-valve will consequently'then' remain closed and the cylinder will not receive any charge of explosive mixture. This skipping of charges continues until the en-'6o gine has reassumed its normal speed, whereupon the admission-valve is opened again regularly.

In the annexed drawings, Figure l is thefront elevation of a gas-engine cylinder with my improved regulating device attached thereto, the aforesaid lever being in operative position. Fig. 2 is a like View showing the lever in difierent position. Fig. 3 is a plan corresponding to Fig. 1. Fig. 4 is a sectional plan of the lever and other parts drawn to a larger scale. Fig. 5 is a front view of the device, with different arrangement of themea'ns for oscillating the lever. Fig. 6 is an enlarged front view of the lever belonging thereto. 7 5

In Figs. lto 4, a is the admission-valve for gas or vapor in box a. b is the stem of the said valve. 0 is the reciprocating finger,which is fixed in a bracket is, secured to the slidevalve Z. d is the oscillating lever, turning on a horizontal pivot m. e is the pin through which the finger c operates on the valve-stem b, the pin being mounted and arranged to slide in a sleeve f, integral with the lever d.

g is a spring inclosed in the sleeve f and 'acting against a collar on the pin 6, so as to keep the latter pressed with its collar outwardly against a shoulder disposed inside of the sleeve. h is the tappet, through the medium whereof the lever dis oscillated by the en- 9o gine, the said tappet forming an arm of the lever z, turning on the same pivot as the lever d, and connected by the rod 9' to the bracket is. n is a counter-poise placed on an arm 01' of the lever d, and whereby the weight of the 5 sleeve f is so balanced that the lever will perform its return oscillation in the required time.

If the engine is running at the normal speed and the slide-valve Z is at the end of its inward stroke, thep'arts will be in the'po sition shown 'by Fig. 1', the pin 6 being then in a line i with and engaged between the finger c and the valve-stem b, and the finger having acted through the pin on the stem. When the slideward and puts the pin 6 out of line with the finger a.

lever 61 to drop, and provided the lever be properly balanced it will closely follow the tappet, so that the pin eis re-engaged by the finger c as soon as it has come into a line therewith. The tappet being then at or near the 'end of its downward oscillation also serves to prevent the leve'rd from dropping below its operative position. 7 If, on the other hand,

the speed of the engine is above the normal,

the lever d will rem ain behind relatively to the motion of the t'appeth, and it will be too late to be engaged by the finger c. The finger will conse uently pass under the pin 9, as shown by Fig. 2, and no action'on the valve-stern will take place. l

According to Figs. '5 and 6 the means for oscillating the lever cl upward consist in the cam-surface 0, formed on the underside of the lever, and the reciprocating tappet 71.,integral with the bracket 70, the cam-surface being so arranged that when the slide-valve I begins to move outward the tappet h willpush against the said surface and swingthe lever upward, while when the slide-valve is at the end 'of its inward stroke the lever rests on the tapp'et. For the rest the mechanism does not differ from the one represented by Figs. 1 to 3. b

I claim as my invention l 1. The combination, with the admissionvalve of'a gas or petroleum engine, of a valvegear comprising a reciprocating finger in line with the valve-stem, an oscillating lever, a

l 1 At the next inward stroke of the slide-valve the tappet h, receding, allows the spring-controlled pin carried by said lever and adapted to transmit motion from said finger to said valve-stem, and means for tilt ing said lever at each stroke of the finger, said lever being free to return to its normal position bygra vityin time to actuate said valve-stem wheilthe engine is running at normal speed, whereby the regulation of the engine is effected, substantially as described.

2. The combination of the slide-valve Z, the

admission-valve a, having the stem 19 parallel to the motion of the slide-valve, the finger c fixed tothe slide-valve in a line with the stem 12, the levercLcapable of oscillating by gravity and having the sleeve f, the pin 6, mounted in said sleeve and adapted to engagebetween the valve-stembandthefing'er c, the spring g, controlling the pin 6, and a tappet actuated by the slide-valve and wherebythe lever 61 and the pin 6 areoscillated to throwthe pin out of line with the finger c at the time the alve moves outward, substantially as speciied'.

3. The combination of the slide-valve Z, the admission valve a, having the stem bparallel to the motion of the slide-valve; the finger c, fixed to the slide valve in'a line with the stem 1), the lever cl, turning ona horizontal pivot m "and 'havingthe sleeve f, and'an arm cl",with the adjustable counterpoi'sea, the pin e, mounted in the said sleeveand'ad'a'pted to engage between the valve-stem b and the finger 0, the spring g, controlling the pine, the lever 11, having the tappet h, adapted to act from the side against the lever cl, and the rod j, connecting the lever i with the slide-valve, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnes'ses'. a

OTTO VOGELSANG. Witnesses:

MORITZ HILLE, BRUND GORTES. 

